Finding the Third Proportional to 911,140 and 1,389,174

Step by Step Solution

1. Step 1: Write the proportion equation
   911,140 : 1,389,174 = 1,389,174 : x
2. Step 2: Convert to fraction form
   911,140/1,389,174 = 1,389,174/x
3. Step 3: Cross multiply
   911,140x = 1,389,174 × 1,389,174
4. Step 4: Simplify right side
   911,140x = 1,929,804,402,276
5. Step 5: Solve for x
   x = 1,929,804,402,276/911,140
6. Step 6: Final answer
   x = 2,118,010.85